Combined coal and gas stove



J. H. SATTLER.

COMBINED COAL 'AND GAS STOVE.

APPLICATION FILED JULY 11. m7.

1,317,397.. PatentedSept. 30, 1919.

[ M I W INVENTOR d. H. Sfl TT'LEI? Wa'tnaaa Arm/nuns JOHN H. SATTLER, OF SAN FRANCISCO, CALIFORNIA.

COMBINED COAL AND GAS STOVE.

Specification of Letters Patent. Patented Sept. 30, 1919.

Application filed. July 1 1, 1917. Serial No. 179,844. I

To all whom it may concern:

Be it known that 1, JOHN H. SATTLER, a. citizen of the United States, and a resident of the city and county of San Francisco and State of California, have invented a new and useful Combined Coal and Gas Stove, of which the following is a specification.

The invention relates to stoves which may be operated with gas or with coal or wood.

An object of the invention is to provide in a stove of the class described, an oven which is efficiently and properly heated either by the gas or coal fire.

Another object of the invention is to provide a stove in which the combustion of the gas is completed before entering the oven.

A further. object of the invention is to provide a stove of the class described having a gas combustion chamber freely open to the atmosphere.

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description where I shall outline in full that form of theinvention which I have selected for illustration in the drawings accompanyingand forming part of the present specification. In said drawings I have shown one specific form of my invention, but it is to be understood that the invention, as expressed in the claims, may be embodied in a plurality of forms.

Referring to said drawings:

Figure 1 is a vertical section of one form of combined coal and gas stove of my invention.

Fig. 2 is a vertical section taken on the line 2-2, Fig. 1. V

Fig. 3 is a horizontal section taken onthe line 33, Fig. 2.

The present invention relates particularly to the construction and arrangement of the oven, flues and gas burner within; the stove,

so that the oven is properly heated when either the gas or the coal fire is being used. The heat for baking or roasting is applied differently when coal is burned than when gas is burned. When coal is used as fuel,

the food in the oven is heated by radiation, since the products of combustion do not come intocontact with the food. 7 When gas is employed, the food is heated by direct contact with the products of combustion, which enter the oven, In accordance with my nvention, I arrange the gas burner in a large combustion chamber, freely open to the atmosphere and arranged below the main bottom of the stove and provide flues for conducting the gases of complete combustion directly into the oven. This not only insures complete combustion of the gas, but prevents transfer of heat to the oven by radiation through the bottom lining, a condition which causes food in the oven to burn on the bottom.

The stove of my invention is provided with a suitable fire box 2, provided with a grate 3, for the burning of coal, wood or other fuel. From the fire box, the products of combustion pass into the chamber or flue 4 formed between the top 5 of the stove and the top oven plate 6. From this chamber the gases may pass into the flue 7 which is connected directly to the chimney. The passage between the chamber 4: and the flue 7 is controlled by the damper 8 which when closed causes the gases to pass down through the back flue9 into the bottom flue 12. The wall or plate 11 which separates the flues 7 and 9 extends into the bottom flue 12 so that the gases pass forward in thebottom flue, around the end of the wall and back into the flue 7, whence they pass up the chimney. 1

The bottom flue occurs between the bottom oven plate 13 and the main bottom 14: of the stove. 7

The oven is closed at the sides by the front oven plate 15 and the back oven plate 16 and these plates are spaced from the main bottom 14 of the stove and extend down below said main bottom, and being spaced from said bottom and from the side walls 17 of the bottom flue, form passages 18 connecting the chamber below the bottom of the stove with the oven. These passages 18 are controlled by dampers 19 which are operated from the front of'the stove. The front and back oven plates 15 and 16 extend downward below the main bottom 1 L of the stove and together with the main bottom and the back wall 22, inclose a chamber 21, in which the gas burner 23 is ar- V which protects the main bottom from the direct heat of the flame. When the gas burner is not used, the dampers 19 areclosed, but when the gas burner is used, the dampers 19-are 'opened-, permit;-

ting the gases of combustion and heated air to pass through the passages 181nto'" the oven. The chamber 21 is large and is open at the bottom and-sufficientair is-- thesefore provided to complete the combustion of the gas before entering'theoven; The downward extension of the front and back oven plates 15' and '16 prevent" anyloss' of heatby radiation and alsoserve to form a broiling chamber, racks 25 being provided for that purpose.

hot gases. to freely enter the oven, the linings 26 being preferably alined with the" side wallsl7 of thebottom flue; Theback-lin ing 27 provides a chamber between theioven and-the main'back 28 of'the stove and the" top lining 29*formsa'passage 31 below the top of the oven; The top lining'29isprovided at its forwardend with aplurality of apertures; 32' connecting the oven with the passage 31 and the'hotgases discharge from the passage 31 into the flue 7 through the apertures 33" formed in of the stove.

The side and front 7 walls 34: of thestove 7 preferably extend down to the same plane as the bottom of the plates 15'andi16 and" the stove is supported on legsto give-free access of air'to the combustionchamberQI.

I claim: e

1. In'a combined coal and gas-stove, a front oven'plate, a back oven plate and-a bottom oven plate inclosing an oven, a fine for the gases of combustion of "the coal fire arranged below said bottom ovenplate'and being of less width thanthe oven, theside walls of .the flue being spaced from the-front" and' back oven plates, whereby flues are'provided between the front and back oven plates and the side walls of the coal gas flueand a gas burnerarranged below said coal 2. In a combined coal and gas ;stove, a

front oven plate, a back oven plate and a bottom oven plate inclosing an oven, a flue for the gases of combustion of the coal fire arranged below said bottom oven plate and being of less width than the oven, the side? walls of theflue being spaced--"from the front and back oven plates, whereby fluesare provided between the front and back the mainfback '28 3. In a combined coal and gas stove, a front oven plate, a back oven plate anda bottom oven plate inclosing an oven, a flue for the-gases of'combustion-of the coal'fire arranged'below said bottom oven plate and being of less widththan the oven, the side walls of the flue being spaced from the front andr -back oven"plates and the side walls of the-coal gas flue, a gas burner arranged below, said, coal gas flue and apertured-linings in said oven alined with'the side walls of said coal-gas---'-flu'e." I r p 4. In a combined coal and gas -stove, an oven, a flue .of' less width than said even forthe gases of combustion of'the-coa-l fire arranged below-; said oven, front and backv v oven'plates spaced from the-"side walls of The oven is provided 'with-, linings' 26" at the sides, which are apertured to allow the:

oven, a-flue arranged in the-rear of the oven 5 connecting said flues, said flu'ebelow the oven being-of less-width thanthe oven whereby flues opening into the-oven are'p'ro vided on opposite sides of' Said flue-below: the oven and a gas burner arranged below V the-said latter flue:

6'. In a combined coal and gas-"stove; an oven, a flue fortheggases'of coinbustion of loo the coal fire arranged below said' oven ya I chambenbeloW said flue communicating with the oven, a gas burner in'said chamberg a top lining in said ovenspaced from the": top oven plate and forming a-flue above-said lining, said-lining being provided with aper tures adjacent its forward-*end,aflue-adapt edto be connected with'the chimney; and' aa: apertured main oven-"back plate 'separating the latter flue from th'e flue-above the -oven lining. r

7 In a combined coaland gas' stove; an l oven, a flue for the gases of combustion' of the-coal fire arranged b'e'low said oven -a chamber below said flue A communicating: with the:- oven, a gas burner I said chamber, a main back plate fo'r said oven' anda flue: behind sai'd back plate" adapted for- 'connection with the chimney, said ba'ck plate" bein tured to I connect 5 the oven with 8; In a Y combined coal 1 and gas stove, -a front oven plate formingthe front- 0f the oven, a back oven plate. forming the back of T the oven, a bottom oveirplate-spaced from izs said front-and back ovenplates, a flue for the gases of combustion of 'the-coal 'fire an ranged belowsaid bottom oven' pl'ate and being of less Width than the oven, the side In testimony whereof, I have hereunto set Walls of the the being spaced from the front my hand at San Francisco, California, this andti oven plzgegfivherebydflufis are pro- 6th day of July, 1917.

vi e etween t e ont an ac]: oven plates and the side Walls of the coal gas JOHN SATTLER' flue, and a, gas burnerarranged below the In presence of coal gas flue. H. G. PRos'r.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. i 

